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shows a 4.0-cm-wide plastic film being wrapped onto a 2.0-cm-diameter roller that turns at 94 rpm. The plastic has a uniform surface charge density of
shows a 4.0-cm-wide plastic film being wrapped onto a 2.0-cm-diameter roller that turns at 94 rpm. The plastic has a uniform surface charge density of -2.4 nC/cm2.
What electron current is driven through a 1.7- mm -diameter iron wire by a 0.067 V/m electric field?
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